Title :
Compact InP-based 90° hybrid using a tapered 2×4 MMI and a 2×2 MMI coupler
Author :
Jeong, Seok-Hwan ; Morito, Ken
Author_Institution :
Fujitsu Labs. Ltd., Japan
fDate :
May 31 2010-June 4 2010
Abstract :
We proposed a novel 90° hybrid using a paired-interference based linearly tapered 2×4 multimode interference (MMI) coupler and a 2×2 MMI coupler. We theoretically calculated and experimentally demonstrated that the proposed 90° hybrid has very short device length of ~227 μm and is never accompanied by any waveguide intersections for performing balanced detection. The proposed device exhibited quadrature phase response with a relative phase deviation of <;±5° over C-band spectral range.
Keywords :
III-V semiconductors; indium compounds; optical couplers; optical waveguides; C-band spectral range; InP; multimode interference coupler; waveguide intersections; wavelength 227 mum; Integrated optics; Interference; Optical coupling; Optical crosstalk; Optical devices; Optical sensors; Optical waveguide theory; Optical waveguides; Phase shifters; Quadrature phase shift keying; Coherent detection; MMI coupler; Optical waveguide device; QPSK demodulator; optical hybrid device;
Conference_Titel :
Indium Phosphide & Related Materials (IPRM), 2010 International Conference on
Conference_Location :
Kagawa
Print_ISBN :
978-1-4244-5919-3
DOI :
10.1109/ICIPRM.2010.5516301
